Echo - The Physics Society Blog

Introduction Energy is one of the major constituents of our normal livelihood. We built our civilized society on the basis of pure energy resources. As an introductory fact, Energy is still a complex equation which needs to be addressed. There exists no ultimate source of energy which we can tap into, so that it remains a big concern in front of us. Ultimately we need to find a source of clean and pure energy which can fuel our aspiring needs of  the future. One of the most promising and reliant sources is nuclear energy. Nuclear energy has been in  development for more than 80 years, From the era of the second world war. In 1945 when the US bombed Japan in Hiroshima and Nagasaki the world saw the destructive capabilities of nuclear energy. The basic concept of nuclear energy first came into picture when Albert Einstein gave his famous mass - energy equivalence equation.Even Though he knew that there exists a possibility of a clean energy source in them,he was backlashed by it...

  Early on in our history on Earth, we humans realized the importance of measuring quantities. This happened much before scientists needed to measure things accurately to be able to develop our understanding of the world. It was important even in daily life. To get paid for the wheat a farmer produced, it needed to be weighed. How heavy is the produce? - Mass . How far is that lake? - Distance or Length . How much time would it take for the enemy army to attack us based on their current location? - Time . The answers to these questions were much more a necessity than curiosity. So, we learned to count and measure, albeit differently in different areas. But the idea everywhere was the same - the need to know quantities in numbers. After this the idea of units is easily understood. Example: if one wants to know the length of a piece of clothing, just measure it with respect to something. Call that something one ‘unit’ of length. Like measure it with the span of your hand and say it's...

An Introduction to Fermi Paradox and it’s Solutions   The observable universe is 90 billion light years in diameter and is a home to about 100 billion galaxies.  Each of those galaxies is said to be home to 100 billion to 1000 billion planets. We can very confidently claim that there are trillions of planets in the universe that are habitable, so we must not be the only intelligent life in the universe right, or are we? At this point we must realize that even if there is intelligent life beyond our home galaxy, we will never be able to find them or communicate with them, since it would take us billions of years to reach another galaxy even at the speed of light. Therefore, let us focus on our immediate galactic neighborhood i.e. the Milky way. The Milky way has an approximate of 20 billion sun-like stars harboring their own solar system, about 1/5 th of these solar systems have a planet in the habitable zone, which equals 4 billion habitable planets. Considering that the Milk...